body {
    margin: 0px;
  }

  .header_con {
    height: 100px;
    background-color: #458ccb;
  }

  .header {
    width: 1000px;
    height: 100px;
    margin: 0px auto;
  }

  .logo {
    float: left;
    width: 197px;
    height: 67px;
    margin-top: 16px;
  }

  .getJoke {
    width: 120px;
    height: 36px;
    font-size: 16px;
    background-color: #ff0;
    border-radius: 4px;
    cursor: pointer;
    outline: none;
    float: right;
    border: 0px;
    margin-top: 32px;
  }

  .joke-container {
    width: 516px;
    height: 349px;
    margin: 40px auto 0;
    background: url('../images/bean01.png') no-repeat;
    position: relative;
  }

  .joke-text {
    width: 390px;
    height: 155px;
    position: absolute;
    left: 52px;
    top: 29px;
    font-size: 16px;
    line-height: 24px;
    color: #333;
    overflow: auto;
  }